CN202419489U

CN202419489U - Diffusion film, backlight module and display device

Info

Publication number: CN202419489U
Application number: CN2012200637726U
Authority: CN
Inventors: 周晓东; 柳在健
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2012-02-23
Filing date: 2012-02-23
Publication date: 2012-09-05
Anticipated expiration: 2022-02-23

Abstract

The utility model provides a diffusion film, a backlight module and a display device, which relate to the technical field of display, and are used for diffusing light uniformly and improving the brightness of the light. The diffusion film comprises a second diffusion layer, a substrate, a first diffusion layer and a light-gathering layer from the incident side in sequence, wherein the light-gathering layer is provided with at least one light-gathering structure; and the second diffusion layer is provided with at least one light diffusion structure. The light can be uniformly diffused, and the brightness of the light is improved.

Description

A kind of diffusion barrier, module backlight and display unit

Technical field

The utility model relates to the Display Technique field, relates in particular to a kind of diffusion barrier, module backlight and display unit.

Background technology

The backlight liquid crystal display module mainly contains parts such as reflecting plate, LGP, diffusion barrier and brightness enhancement film, and wherein, the effect of diffusion barrier is that the light that LGP appears is evenly distributed.Diffusion barrier of the prior art comprises double-layer structure: diffusion layer and the polyester sandwich layer that is positioned at the diffusion layer upper surface; Because the uniformity of the light that the diffusion barrier of this structure of process diffuses out is not good; And need cooperate the use brightness enhancement film, to play the optically focused effect, increased cost of manufacture.Module backlight can also be applied to other display unit except that being applied to LCD, such as liquid crystal TV set, DPF, Electronic Paper, mobile phone etc.

The utility model content

The utility model provides a kind of diffusion barrier, module backlight and display unit, with so that light even diffused and promote light luminance.

For achieving the above object, the utility model adopts following technical scheme:

A kind of diffusion barrier comprises: substrate be arranged on first diffusion layer on said substrate one side, said diffusion barrier also comprises: light collecting layer is positioned at a side of first diffusion layer; Second diffusion layer is positioned at the opposite side of said substrate.

Further, said second diffusion layer has at least one astigmatic structure.

Further, said astigmatic structure is concavees lens shape structure or prism-like structure.

Further, said second diffusion layer is provided with the low-refraction particulate.

Further, said low-refraction particulate is a silica dioxide granule.

Further, said light collecting layer has at least one concentration structure.

Further, said concentration structure is lens-shaped structure or prism-like structure.

Further, said light collecting layer is made up of the high index of refraction particulate.

A kind of module backlight includes above-mentioned described diffusion barrier.

A kind of display unit includes above-mentioned described module backlight.

The diffusion barrier that the utility model provides, module backlight and display unit; Side at substrate is provided with first diffusion layer; And be provided with second diffusion layer at the opposite side of substrate; Said second diffusion layer has at least one astigmatic structure, is provided with light collecting layer in a side of first diffusion layer, and said light collecting layer has at least one concentration structure.Light through second diffusion layer is dispersed can get into first diffusion layer more uniformly, to obtain better dispersion effect, assembles through light collecting layer from the light that first diffusion layer penetrates again, and makes the light correcting of deviation, has promoted the brightness of light.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the utility model; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of a kind of diffusion barrier of the utility model embodiment;

Fig. 2 is the sketch map of the astigmatic structure of the utility model embodiment; Fig. 2 (a) is depicted as concavees lens shape structure, and Fig. 2 (b) is depicted as the prism-like structure;

Fig. 3 is the sketch map of the concentration structure of the utility model embodiment; Fig. 3 (a) is depicted as the lens-shaped structure, and Fig. 3 (b) is depicted as the prism-like structure;

Fig. 4 is the structural representation of a kind of module backlight of the utility model embodiment.

Description of reference numerals

10: diffusion barrier; 101: substrate; 102: the first diffusion layers; 1021: diffusion particle;

103: the second diffusion layers; 1031: astigmatic structure; 104: light collecting layer; 1041: concentration structure; 301: reflecting plate; 302: LGP.

The specific embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

As shown in Figure 1, the utility model provides a kind of diffusion barrier 10, comprising: substrate 101, first diffusion layer 102, second diffusion layer 103 and light collecting layer 104.

First diffusion layer 102 is arranged on a side of substrate 101; Be the bright dipping side, there is diffusion particle said first diffusion layer 102 inside or plays the structure of diffusion, and what illustrate in the utility model accompanying drawing is that first diffusion layer, 102 inside have diffusion particle 1021; In addition, also comprise:

Second diffusion layer 103 is positioned at the opposite side of substrate 101, i.e. incident side, and there is diffusion particle second diffusion layer, 103 inside or plays the structure of diffusion, and what illustrate in the utility model accompanying drawing is that second diffusion layer, 103 inside have diffusion particle 1021.

Said second diffusion layer 103 has at least one astigmatic structure 1031, and said astigmatic structure 1031 is meant the structure that light is disperseed, so that light evenly scattering after this structure penetrates.

Said astigmatic structure 1031 can be specially the prism-like structure shown in the concavees lens shape structure shown in Fig. 2 (a) or Fig. 2 (b); Delegation is a plurality of should astigmatism structure 1031 to have formed the array decorative pattern shown in Fig. 2 (a) or 2 (b), and astigmatic structure 1031 can also form circle, arc decorative pattern etc.

Like this, light makes entering first diffusion layer 102 that light is dispersed more after through second diffusion layer 103, thereby makes that the light that penetrates from first diffusion layer 102 is more even.

Light collecting layer 104; Said light collecting layer 104 is arranged on a side of first diffusion layer 102, i.e. bright dipping side, and this light collecting layer 104 has at least one concentration structure 1041; This concentration structure 1041 is meant the structure that can make convergence of rays, so that light can promote brightness after this structure penetrates.

Concentration structure 1041 can be specially the prism-like structure shown in the lens-shaped structure shown in Fig. 3 (a) or Fig. 3 (b); The a plurality of concentration structures 1041 of delegation have formed the array decorative pattern shown in Fig. 3 (a) or 3 (b), and concentration structure 1041 can also form circle, arc decorative pattern etc.

Like this, the light evenly dispersed is through behind this light collecting layer 104, thereby can make the light correcting of deviation can converging ray, to reach the effect that promotes brightness.

Concrete; Astigmatic structure 1031 can adopt modes such as etching, precision optical machinery portrayal method, ejection formation to produce the prism-like structure shown in the concavees lens shape structure shown in Fig. 2 (a) or Fig. 2 (b) in the utility model; Certainly; The astigmatic structure 1031 that the utility model embodiment provides can also be pearlitic texture, in fact, in practical application so long as can play the micro-structural of light diffusion and get final product.Same; The utility model concentration structure 1041 can adopt modes such as etching, precision optical machinery portrayal method, ejection formation to produce the prism-like structure shown in the lens-shaped structure shown in Fig. 3 (a) or Fig. 3 (b); In practical application, get final product so long as can play the micro-structural of convergence of rays effect.

Substrate 101 can be glass substrate or plastic substrate.

Another kind of embodiment as the utility model; On said second diffusion layer 103 the low-refraction particulate can also be set; Concrete said low-refraction particulate can be for silica dioxide granule etc., and above-mentioned described particulate can adopt modes such as coating, printing to be arranged on second diffusion layer 103.

Said light collecting layer 104 can also be to be made up of the high index of refraction particulate, and concrete said high index of refraction particulate can be resin particle, aromatic polyester particulate etc.

Need to prove that the structure of the diffusion barrier that present embodiment provides is according to being followed successively by to the bright dipping side from incident side: second diffusion layer, substrate; First diffusion layer, light collecting layer, but in practical application; The structure of this diffusion barrier can also be second diffusion layer successively; First diffusion layer, substrate, light collecting layer.

The diffusion barrier of the utility model; Side at substrate is provided with first diffusion layer, and is provided with second diffusion layer at the opposite side of substrate, and this diffusion layer has at least one astigmatic structure; Side at first diffusion layer is provided with light collecting layer, and this light collecting layer has at least one concentration structure.Light through second diffusion layer is dispersed can get into first diffusion layer more uniformly, to obtain more dispersion effect, assembles through light collecting layer from the light that first diffusion layer penetrates again, and makes the light correcting of deviation, has promoted the brightness of light.

As shown in Figure 4, the utility model provide a kind of module backlight, comprise reflecting layer 301, LGP 302 and diffusion barrier 10.

The module backlight that the utility model provides; After light is injected LGP 302 through reflecting layer 301; Can make light evenly spread and the directive liquid crystal panel through diffusion barrier 10,, can make light evenly distribute the back through the light collecting layer convergence because this diffusion barrier has light collecting layer and two-layer diffusion layer; Promoted the brightness of light, thereby evenly dispersed after making light through this module backlight and improve light luminance.

The utility model also provides a kind of display unit, comprises above-mentioned module backlight, and said display unit is liquid crystal TV set, liquid crystal display device, DPF, Electronic Paper, mobile phone etc.

The display unit that the utility model provides comprises the module backlight in the foregoing description; After light is injected LGP through the reflecting layer, make light evenly spread and the directive liquid crystal panel through diffusion barrier again, because this diffusion barrier has light collecting layer and two-layer diffusion layer; Can make light evenly distribute the back through the light collecting layer convergence; Promote the brightness of light, thereby evenly dispersed after making light through this module backlight and improve light luminance, improved image quality.

The above; Be merely the specific embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technical staff who is familiar with the present technique field can expect changing or replacement in the technical scope that the utility model discloses easily, all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of said claim.

Claims

1. diffusion barrier comprises: substrate be arranged on first diffusion layer on said substrate one side, it is characterized in that, also comprise:

Light collecting layer is positioned at a side of first diffusion layer;

Second diffusion layer is positioned at the opposite side of said substrate.

2. diffusion barrier according to claim 1 is characterized in that, said second diffusion layer has at least one astigmatic structure.

3. diffusion barrier according to claim 2 is characterized in that, said astigmatic structure is concavees lens shape structure or prism-like structure.

4. diffusion barrier according to claim 1 is characterized in that, said second diffusion layer is provided with the low-refraction particulate.

5. diffusion barrier according to claim 4 is characterized in that, said low-refraction particulate is a silica dioxide granule.

6. diffusion barrier according to claim 1 is characterized in that said light collecting layer has at least one concentration structure.

7. diffusion barrier according to claim 6 is characterized in that, said concentration structure is lens-shaped structure or prism-like structure.

8. diffusion barrier according to claim 1 is characterized in that said light collecting layer is made up of the high index of refraction particulate.

9. a module backlight is characterized in that, comprises the described diffusion barrier of claim 1～8.

10. a display unit is characterized in that, comprises the described module backlight of claim 9.